Got my white Magic Keyboard, and I really like how it looks! ...I was thinking though that mine might be busted, the backlight wasn't working at all, and the backlight brightness slider in settings wouldn't even move. Turns out it really wants a dark room to enable the backlight - even though the lights are off in my room, I had to cover up the ambient sensor with my hand to light up the keys (and make the brightness slider function).
It makes sense, the black letters on white are easy to see in darker situations than the white letters on black keys, and white light on white key could actually make the keys *harder* to read. But still, Apple should make that more clear, so other people don't think something is wrong and (like me) try and figure out how to make them work. I also wish Apple would let us disable the auto-brightness, like we can with the screen brightness, but I know that's never going to happen.
It makes sense, the black letters on white are easy to see in darker situations than the white letters on black keys, and white light on white key could actually make the keys *harder* to read. But still, Apple should make that more clear, so other people don't think something is wrong and (like me) try and figure out how to make them work. I also wish Apple would let us disable the auto-brightness, like we can with the screen brightness, but I know that's never going to happen.